code: def imread_skimage(filename):
      """Scikit-image loader with an identity affine matrix."""
      skio = require_module("skimage.io")
      img = skio.imread(filename)
      return image2nibabel(img)
  
file_path: NiftyNet/niftynet/io/image_loader.py
imports: from collections import OrderedDict
  import nibabel
  import numpy
  import tensorflow
  from niftynet.utilities.util_import import require_module
label_desc: Use image node_id 5 for calling a global function with example usage: imread_skimage(filename) and returns: image2nibabel